Yeah we shouldn't jam pre that deep. Also as the others say above he has to bet KK AA on this flop , but what if he tried to check/raise them? He bets until river so I put him on AA KK AKdd. Would he 4bet JJ pre? I guess not.
Plugged them on equilab, without JJ:
Board: 6
5
4
*J
*3
*******Equity*****Win*****Tie
MP2****25.00%**25.00%***0.00%*{ QdQc }
MP3****75.00%**75.00%***0.00%*{ KK+, AKs }
With JJ:
Board: 6
5
4
*J
*3
*******Equity*****Win*****Tie
MP2****21.05%**21.05%***0.00%*{ QdQc }
MP3****78.95%**78.95%***0.00%*{ KK+, JJ, AKs }
I could be wrong but that's what I think about it. Correct me If you disagree or I'm calculating something wrong here